US 12,228,060 B2
Heater control for an after treatment system
Ignace Theodorus Maria Van Den Heuvel, Eindhoven (NL); and Tim Weidema, Hoef en Haag (NL)
Assigned to DAF Trucks N.V., Eindhoven (NL)
Filed by DAF Trucks N.V., Eindhoven (NL)
Filed on Sep. 14, 2023, as Appl. No. 18/368,241.
Claims priority of application No. 2033137 (NL), filed on Sep. 26, 2022.
Prior Publication US 2024/0110495 A1, Apr. 4, 2024
Int. Cl. F01N 3/20 (2006.01); F01N 3/10 (2006.01)
CPC F01N 3/2006 (2013.01) [F01N 3/10 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An internal combustion engine comprising:
a heater system to generate heat to an exhaust after treatment system including a catalytic converter;
a control system arranged to control the heater system; wherein the control system is programmed to heat the exhaust after treatment system based on a setpoint value;
wherein the control system comprises a controller having an error input and an output; that outputs an adjusted heating power setpoint value, having been adjusted by a feedback signal, said adjusted heating power setpoint value provided in parallel to a branch including the heater system and a branch including a modelled response circuit;
said modelled response circuit receiving the feedback signal and comprising, in series, a response circuit part outputting a modelled response to said feedback signal, and a delayer circuit part that delays the modelled response;
a first subtractor that subtracts a measured heat output and an output of the modelled response circuit;
an adder that adds an output of the response circuit part and an output of the first subtractor;
a second subtractor that subtracts the adjusted heating power setpoint value from an output of the adder to provide a control error signal for the error input of the controller.